It would depend on what kind of investment or project you would made since there are lots of categories to be chosen which each one of them would really require such bitcoins.I would like to ask how much you would able to put on? So that we would able to pinpoint or give you the best idea regarding on the amount you do said.If you say simple project then most likely it would be a faucet site which 2 btc would be somehow enough and when you comes into complex one then you would go for gambling site or exchange site but does require big amounts.